Furnace.



T. S. BLAIR, JR.

. .FURNAGE. APPLICATION P'ILED JULY 10, 1911.

Patented Dec. 19, 1911.

3 SHEETSSHEET 1.

I @L Ami/0.

T. s. BLAIR, JR.

FURNACE.

- APPLICATION FILED JULY 10. 1911.

Patented Dec. 19, 1 911.

3 SHEETS-SHEET 2.

T. s. BLAIR, JR,

FURNACE.

APPLICATION FILED J ULY 10. 1911 1,012,236. Patented Dec. 19, 1911.

. I 7 )l n M 5 w al I I l J 2:1: ll s n 1 31 I. 0 w 1 x Z T n kw H S i s a I! H v I I 9 u 3 m I H- 1 mi A -H a H u w /d 0 3 UNITED STATES PATENT OFFICE.

rnomas s. BLAIR, an, or ELMHUBST, ILLINOIS, AssIGNon To run BLAIR ENGINEER- me 0014mm, or new YORK, n. Y., A CORPORATION or NEW roan.

Specification ot-Letters I'atent.

FURNACE.

Application filed July 10, 1911. Serial No. 687,885.

To all whom it may concern:

Be it known that I, THOMAS S. BLAIR, J r., a citizen of the United States, residing at Elmhurst, in the county of Kane and State of Illinois, have invented a new and useful Improvement in Furnaces, of which the following is a specification.

My invention relates to an improvementof the slag-pocket feature of a regenerative product. This expense is particularly heavy in the operation of baslc furnaces. Attempts have heretofore been made toremedy the difiiculties referred to by providing, for collecting the slag, receptacles adapted to be placed for the purpose within the permanent walls of the furnace-structure in position to receive the slag, for removal when How-' filled to be replaced by empty ones. ever, such attempts have been found impractical because the slag adheres to the walls of the structure and the receptacles can not be removed without seriously damaging or des'troying suchwalls; and, besides, the temperature in the slag-pockets is altogether too high to permit men to work in them.

I overcome all difiiculty in the matter by providing the slag-pocket structure as a removable portion or section of the furnace structure, whereby it may be readily and,

relatively speakin quickly removed when.

filled and as readily replaced by an empty one; and this constitutes, generally stated, my invention.

In the accompanying drawings, Figure 1 is a broken view in longitudinal vertical section of one of the two similar ends of an open-hearth furnace provided with my improvement; Fig. 2 is a section on line '2, Fig. 1; Fig. 3 is a view like that. presented in Fig. 2 of the slag-pocket in side elevation showing the temporary brick-fillings in the spaces which separate its walls from the adair and gas-ports.

jacent permanent walls of the furnace-structure, and Fig. 4 shows the same. with the' slag-pocket in cross-sectional elevation.

The furnace, as shown in the drawings for Illustratin my improvement, contains, aside from the atter, no features of novelty .rcquiring it to be herein described in detail, although it is represented as equipped with a hollow water-cooled metal hood 5 'in 'ac-' .cordance with reissued Letters Patent No.

12,939, granted to me April 13,1909, to supplant the brick arch forseparating the In this connection it is proper to say, basing the statement on numerous instances of practical demonstration, that a furnace equipped with my said patented invention would remain intact to enable it to be continued in regular operation for an indefinitely-long period were it not for the periodical interruption, referred to made necessary for the emptying of the slagpockets.

Patented Dec. 19,1911.

The slag-pocket structure 6, according to my improvement, is a complete structure in itself separate from the remainder ofthe furnace, aside from the slag-pocket arches 7 and their means of support, hereinafter described. It consists, in its preferred form,

of a wheeled carriage 9, for convenient moving on a track 10 provided in proper position at each end of the furnace, having metal posts 11, suitably braced, rising at intervals from the carriage-bed to provide a frame-work for the brick walls forming the slag-pockets 12. The lower ends of the :port down-takes 13 are provided with suitable metal-binding 14 for supporting the slag-pocket arches 7 at the lower ends of the down-takes, whereby these arches are separate from the slag-pocket walls and not dependent on them for support. The dimensions of the structure 6 are such as to adapt it to fit under the down-takes of the fines,-

are then temporarily closed by bricking them up, as represented at 18, to form tight joints connecting the slag-pockets with the port down-takes and with the regenerativefrom a week to ten days, with the attendant loss ofproduct of the furnace and that due to the expenditure of a very-considerable amount of labor and fuel tobring the furnace back to melting temperature, the whole operation, of removing the slag and restoring the slag-pocket equipment in a furnace in accordance with my improvement, may be accomplished in a few hours, thus also enabling, a large portion of the heat of the furnace to be retained, so that the furnace may be gotten back to normal working conditlons with very little delay and expenditure of labor and fuel. Moreover, the slag pockets may be renewed without any loss of time, fuel or labor more than attends the operation of burning out the fines, which is periodically necessary, if the time selected for eflecting removal and renewal of the slagpockets in the manner described be that of burning out the flues.

What I claim as new and desire to secure by Letters Patent is l. The combination with a regenerative furnace, having a furnace port down-take, and a flue leading to a regenerative chamber, of a slag pocket structure forming the connection between the down-take and the regenerative flue, said slag pocket being bodily placeable into and removable from its operative position. y

2. The combination with a regenerative furnace, having furnace port down-takes and flues leading to the regenerative chambers, of a slag pocket structure forming the connection between the down-takes and the regenerative flues, said slag pocket structure being bodily placeable into and removable from its operative position.

3. The combination with a regenerative furnace having a furnace port down-take and a flue leadin therefrom to a regenerative chamber, 0 a slag pocket structure forming the connection between the downtake-to the regenerative flue, said slag pocket structure comprising a carriage provided with a slag pocket forming walls and bodily placeable into and withdrawable from its operative position.

4. The combination with a regenerative furnace having a furnace port down-take and a flue leadin therefrom to a regenerative chamber, 0 a slag pocket structure forming the connection between the downtake and the regenerative flue, said slag pocket structure comprising a wheeled car- .riage having a wall supporting frame rising from its bed with pocket-forming walls in said frame and bodily placeable into and removable from its operative position.

5. The combination with a regenerative furnace having a furnace port down-take,

; and a flue leading to a regenerative chamber, of a slag-pocket structure forming the connection between the down-take and the regenerative flue, the pocket-forming walls of the slag pocket structure registering with but spaced from the ends of the port downtake walls and those of the adjacent. walls of the regenerative flue when the slag-for1ning pocket is in operative position, and means temporarily filling in said spaces, said slagpocket structure being adapted to be bodily withdrawable from its operative position.

6. The combination with a regenerative furnace having a furnace port down-take and a flue leading to a regenerative chamber, of a binding about the lower end of the port down-take, and an arch supported on said binding, a slag-pocket forming the connection between the down-take and the regenerative flue with its pocket-forming walls registering with but spaced from the ends of the down-take walls and the adjacent walls of the regenerative flue and brick filling in the spaces and forming a temporary joint therewith, said structure being bodily .withdrawable from its operative posit-ion.

THOMAS S. BLAIR, JR. In the presence of- I LII-ImsLAR,

R. SOHAEFER. 

